I recently had to adjust the clamp on my upper radiator hose for my Del Sol. When I did so I had some coolant leak and therefore I added a bit of distilled water to make up for the loss. The timing belt for my car was replaced a few months ago so the coolant is relatively new. My question is, will the added distilled water cause corrosion or any other problems? I'd say I've added about 5-6 cups of distilled water. Should I drain and refill?

 

You're supposed to add distilled water with the coolant anyways (if it's not the pre-mix stuff). Keep an eye on the temperature gauge to see if it has changed. If not, don't sweat it.